944 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
spikes, these 8 to 10 cm. long, subtended by small leaves, the rachis thick, 
angular, puberulous, densely flowered; calyx turbinate-campanulate, about 
6 mm. long, densely scaly without, the scales intermixed with a minute indu- 
ment, villous-tomentose inside, the lobes broadly triangular, subacute, 2.2 mm. 
long; petals ovate, rounded or acuminulate at the apex, glabrous, 0.9 to 1 mm. 
long, 0.6 to 0.7 mm. broad, much shorter than the calyx lobes; stamens 8, the 
filaments glabrous, 1.8 to 2 cm. long, the anthers ovate; disc glabrous inside, 
densely villous on the scarcely sinuate margin; ovary substipitate, fusiform, 
4-angular, densely scaly, 4 mm. long. Fruit about 2 cm. long, 18 mm. across 
the wings, pubescent at first, the pedicels scaly, 8 mm. long. 
Type in the U. 8. National Herbarium, no. 577548, collected on the banks 
of the Diquis River at Currés, near Boruca, Costa Rica, March 4, 1898, by H. 
Pittier (Inst. Fis. Geogr. Costa Rica, no. 12140). 
OTHER COLLECTIONS: 
Costa Rica: Around Nicoya, in thickets, flowers, February, 1900, Tonduz 
(Inst. Fis. Geogr. Costa Rica, no. 18502). 
Nicaragua: Without locality data, C. Wright, U. S. North Pacific Explor- 
ing Expedition, 1853-56. Realejo, Department of Chinandega, flowers, 
January 16, 19038, Baker 2088. 
This species is easily distinguished on account of its long panicles, with many 
pairs of spikes, narrow leaves, and diminutive petals. It is closely related to 
C. argenteum Bertol., but the petals are glab- 
rous and smaller, the stamens longer, and the 
indument somewhat at variance. 
3. Combretum argenteum Bertol. Nov. Comm. 
Acad. Bonon, 4: 412 1840, 
A trailing vine, the old parts gray, glab- 
rous, the new growth sparsely white or brown- 
Fic. 99.—Perianth of Combretum igh-scaly. Leaves coriaceous, the petioles semi- 
polystachyum spread out, the terete, canaliculate, 1 to 1.2 cm. long, densely 
stamens removed. pp, Petals; . 
d, disc. Scale 2. whitish-sealy, the blades ovate-oblong, rounded- 
attenuate and subdecurrent at the base, acute 
or obtuse and emarginate at the apex, 5 to 11 em. long, 2.5 to 5.5 em. 
broad, sparsely white-scaly and punctulate above, a little more densely so 
beneath; stipules foliaceous. Panicles sparsely branched, the rachis angu- 
lar, densely brownish or whitish-scaly; branches simple; calyx turbinate- 
campanulate, 7 mm. long from the base of the limb, densely white-sealy 
without, sparsely white-villous within, the lobes triangular, acute, 1.5 to 
2 mm. long, the sinuses broad and rounded; petals ovate, acute, 1 to 1.1 mm. 
long, 0.7 mm. broad, minutely pilosulous without; stamens 8, the filaments 
12 to 15 mm. long, glabrous, the anthers ovate, pink; disc adnate to the calyx, 
glabrous within, densely white-villous on the sinuate free margin; ovary 
4-angled, sessile, densely scaly, about 2 mm. long. 
Type from Volcin de Agua, Guatemala. 
OTHER COLLECTIONS: 
Mexico: Manzanillo. 
GUATEMALA: El] Rancho, Department of Jalapa, flowers, January 6, 1906, 
Kellerman 5648. Near Trapiche Grande, Department of Guatemala, 
flowers, January 23, 1905, Mazon 3420. 
SALvapor: Tecoluca, Department of San Vicente, flowers, January, 1893, 
Shannon (J. D. Smith, no. 5088). 
This differs from C. farinosum principally in the characters of the flower, 
this being smaller, with ovate, minutely pilosulous petals and ovate anthers. 
The villosity of the calyx inside is also less and the petioles are longer. 
